| 摘要 |
An engine has at least one rotary piston and a hollow rectilinear output shaft. The vehicle wheels are driven by two coaxially aligned transmission shafts coupled to the output shaft through a variable ratio transmission mechanism. One transmission shaft is coaxially inside the output shaft which it entirely traverses. Viewed axially, there are seen successively, the projecting portion of the transmission shaft, the engine, the transmission mechanism and the projecting portion of the second transmission shaft. The arrangement reduces the bulk of the propulsion unit group to that of the engine itself. Preferably a differential and a torque converter are included in the transmission mechanism.
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